quick question...i have the stock ws6 wheels and was thinking about getting 285/40's in the rear and 275/40's in the front. do you think its worth it or should i just go 275 all the way around. think i would be able to tell the diffrence in width in the rear tires?

 

For that slight a difference it may not be worth the loss of tire rotation options, I have different fronts and rears and it sucks. A little alignment issue or a heavy foot lead to replacement quicker than a set thats rotated regularly.